A third critic, Dr. Walter Willett of the Harvard School of Public Health, was blunter: ‘‘This is an even greater pile of rubbish’’ than the 2005 study, he said. Willett and others have done research since the 2005 study that found higher death risks from being overweight or obese.
Flegal defended her work. She noted that she used standard categories for weight classes. She said statistical adjustments were made for smokers, who were included to give a more real-world sample. She also said study participants were not in hospitals or hospices, making it unlikely that large numbers of sick people skewed the results.
‘‘We still have to learn about obesity, including how best to measure it,’’ Flegal’s boss, CDC Director Dr. Thomas Frieden, said in a written statement. ‘‘However, it’s clear that being obese is not healthy—it increases the risk of diabetes, heart disease, cancer, and many other health problems. Small, sustainable increases in physical activity and improvements in nutrition can lead to significant health improvements.’’
Obesity info: http://www.cdc.gov/obesity/data/trends.html
Marilynn Marchione can be followed at http://twitter.com/MMarchioneAP
Mike Stobbe can be followed at http://twitter.com/MikeStobbe